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2013-07-15hw/cpu/a15mpcore: Correct default value for num-irqPeter Maydell1-2/+2
The a15mpcore device claims that its default value for num-irq is the number of interrupts used by the A15MP in the vexpress-a15 board. However that chip has 128 external interrupts, not 64. Since there is only one A15 based model in QEMU currently, we can fix this by simply changing the default value. This error was causing recent (3.10) Linux kernels to print warnings/backtraces when the number of interrupts reported by the GIC was smaller than an interrupt number they wanted to use. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1373032481-15280-1-git-send-email-peter.maydell@linaro.org
2013-07-15target-arm: add feature flag for ARMv8Mans Rullgard3-1/+8
Signed-off-by: Mans Rullgard <mans@mansr.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2013-07-15char/cadence_uart: Fix reset for unattached instancesPeter Crosthwaite1-1/+3
commit 1db8b5efe0c2b5000e50691eea61264a615f43de introduced an issue where QEMU would segfault if you have an unattached Cadence UART. Fix by guarding the flush-on-reset logic on there being a qemu_chr attachment. Reported-by: Soren Brinkmann <soren.brinkmann@xilinx.com> Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Tested-by: Soren Brinkmann <soren.brinkmann@xilinx.com> Message-id: 9009578ee10a50d994b2e10aa2840d73765f5968.1370577272.git.peter.crosthwaite@xilinx.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2013-07-15ahci: Fix FLUSH commandKevin Wolf3-1/+17
AHCI couldn't cope with asynchronous commands that aren't doing DMA, it simply wouldn't complete them. Due to the bug fixed in commit f68ec837, FLUSH commands would seem to have completed immediately even if they were still running on the host. After the commit, they would simply hang and never unset the BSY bit, rendering AHCI unusable on any OS sending flushes. This patch adds another callback for the completion of asynchronous commands. This is what AHCI really wants to use for its command completion logic rather than an DMA completion callback. Cc: qemu-stable@nongnu.org Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-07-15migration: Fail migration on bdrv_flush_all() errorKevin Wolf1-3/+14
If bdrv_flush_all() returns an error, there is an inconsistency in the view of an image file between the source and the destination host. Completing the migration would lead to corruption. Better abort migration in this case. To reproduce this case, try the following (ensures that there is something to flush, and then fails that flush): $ qemu-img create -f qcow2 test.qcow2 1G $ cat blkdebug.cfg [inject-error] event = "flush_to_os" errno = "5" $ qemu-system-x86_64 -hda blkdebug:blkdebug.cfg:test.qcow2 -monitor stdio (qemu) qemu-io ide0-hd0 "write 0 4k" (qemu) migrate ... Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-07-15cpus: Add return value for vm_stop()Kevin Wolf3-10/+16
If flushing the block devices fails, return an error. The VM is stopped anyway. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-07-15block: Add return value for bdrv_flush_all()Kevin Wolf2-3/+9
bdrv_flush() can fail, and bdrv_flush_all() should return an error as well if this happens for a block device. It returns the first error return now, but still at least tries to flush the remaining devices even in error cases. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-07-15qemu-iotests: Update 051 reference outputKevin Wolf2-33/+76
This has been broken by commit bd5c51ee. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-07-15block: Don't parse protocol from file.filenameKevin Wolf6-9/+43
One of the major reasons for doing something new for -blockdev and blockdev-add was that the old block layer code parses filenames instead of just taking them literally. So we should really leave it untouched when it's passing using the new interfaces (like -drive file.filename=...). This allows opening relative file names that contain a colon. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2013-07-15block: add drive_backup HMP commandStefan Hajnoczi3-0/+49
Make "drive_backup" available on the HMP monitor: drive_backup [-n] [-f] device target [format] The -n flag requests QEMU to reuse the image found in new-image-file, instead of recreating it from scratch. The -f flag requests QEMU to copy the whole disk, so that the result does not need a backing file. Note that this flag *must* currently be passed since the other sync modes ('none' and 'top') have not been implemented yet. Requiring it ensures that "drive_backup" behaves like "drive_mirror". Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-07-15blockdev: add sync mode to drive-backup QMP commandStefan Hajnoczi4-17/+38
The drive-backup command is similar to the drive-mirror command, except no guest data written after the command executes gets copied. Add a sync mode argument which determines whether the entire disk is copied, just allocated clusters, or only clusters being written to by the guest. Currently only sync mode 'full' is supported - it copies the entire disk. For read-only point-in-time snapshots we may only need sync mode 'none' since the target can be a qcow2 file using the guest's disk as its backing file (no need to copy the entire disk). Finally, sync mode 'top' is useful if we wish to preserve the backing chain. Note that this patch just adds the sync mode argument to drive-backup. It does not implement sync modes 'top' or 'none'. This patch is necessary so we can add a drive-backup HMP command that behaves like the existing drive-mirror HMP command and takes a sync mode. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-07-14hw/alpha: Use SRM epochRichard Henderson1-1/+3
The 1980 epoch is used by the ARC PALcode for NT. But we're emulating a system using the SRM PALcode. Using the proper epoch results in less confusion in the guest userland. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-07-14hw/alpha: Drop latch_tmp hackRichard Henderson1-41/+12
The memory and i/o core now support passing 64-bit accesses along from the guest, so we no longer need to emulate them. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-07-14exec: Support 64-bit operations in address_space_rwRichard Henderson1-12/+56
Honor the implementation maximum access size, and at least check the minimum access size. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-07-13hw/alpha: Don't machine check on missing pci i/oRichard Henderson3-1/+29
Not really correct, but we don't implement all of the random devices that the kernel looks for. This is good enough to keep us booting. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-07-13hw/alpha: Don't use get_system_ioRichard Henderson3-57/+8
Advancements in the ioport subsystem mean that we need no longer thunk memory-mapped i/o through the system-io address space. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-07-12ioport: remove LITTLE_ENDIAN mark for portioAnthony Liguori1-1/+0
Setting it to LE forces a byte swap when host != guest endian but this makes no sense at all. Herve made the suggestion upon observing that word writes/reads were broken into byte writes/reads in such a way as to assume devices are interpret registers as LE. However, even if this were a problem, marking the region as LE is not useful because what's essentially happening here is that LE is open coded. So by marking it LE in MemoryRegionOps, we're doing a superflous swap. Now, the portio code is suspicious to begin with. The dispatch layer really has no purpose in splitting I/O requests in the first place... Cc: Hervé Poussineau <hpoussin@reactos.org> Cc: Alex Graf <agraf@suse.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-12Force auto-convegence of live migrationChegu Vinod2-0/+82
If a user chooses to turn on the auto-converge migration capability these changes detect the lack of convergence and throttle down the guest. i.e. force the VCPUs out of the guest for some duration and let the migration thread catchup and help converge. Verified the convergence using the following : - Java Warehouse workload running on a 20VCPU/256G guest(~80% busy) - OLTP like workload running on a 80VCPU/512G guest (~80% busy) Sample results with Java warehouse workload : (migrate speed set to 20Gb and migrate downtime set to 4seconds). (qemu) info migrate capabilities: xbzrle: off auto-converge: off <---- Migration status: active total time: 1487503 milliseconds expected downtime: 519 milliseconds transferred ram: 383749347 kbytes remaining ram: 2753372 kbytes total ram: 268444224 kbytes duplicate: 65461532 pages skipped: 64901568 pages normal: 95750218 pages normal bytes: 383000872 kbytes dirty pages rate: 67551 pages --- (qemu) info migrate capabilities: xbzrle: off auto-converge: on <---- Migration status: completed total time: 241161 milliseconds downtime: 6373 milliseconds transferred ram: 28235307 kbytes remaining ram: 0 kbytes total ram: 268444224 kbytes duplicate: 64946416 pages skipped: 64903523 pages normal: 7044971 pages normal bytes: 28179884 kbytes Signed-off-by: Chegu Vinod <chegu_vinod@hp.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2013-07-12Add 'auto-converge' migration capabilityChegu Vinod3-1/+12
The auto-converge migration capability allows the user to specify if they choose live migration seqeunce to automatically detect and force convergence. Signed-off-by: Chegu Vinod <chegu_vinod@hp.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2013-07-12Introduce async_run_on_cpu()Chegu Vinod3-0/+40
Introduce an asynchronous version of run_on_cpu() i.e. the caller doesn't have to block till the call back routine finishes execution on the target vcpu. Signed-off-by: Chegu Vinod <chegu_vinod@hp.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2013-07-12Merge remote-tracking branch 'agraf/ppc-for-upstream' into stagingAnthony Liguori17-227/+688
# By Alexander Graf (16) and others # Via Alexander Graf * agraf/ppc-for-upstream: (22 commits) PPC: dbdma: Support more multi-issue DMA requests PPC: Add timer handler for newworld mac-io PPC: dbdma: Support unaligned DMA access PPC: dbdma: Wait for DMA until we have data PPC: dbdma: Move processing to io PPC: dbdma: macio: Add DMA callback PPC: dbdma: Move static bh variable to device struct PPC: dbdma: Introduce kick function PPC: dbdma: Move defines into header file PPC: dbdma: Allow new commands in RUN state PPC: dbdma: Fix debug print PPC: Mac: Add debug prints in macio and dbdma code PPC: dbdma: Replace tabs with spaces PPC: Macio: Replace tabs with spaces PPC: g3beige: Move secondary IDE bus to mac-io PPC: Mac: Fix guest exported tbfreq values target-ppc: Add POWER8 v1.0 CPU model pseries: move interrupt controllers to hw/intc/ spapr: Respect -bios command line option for SLOF spapr: Use named enum for function remove_hpte ... Message-id: 1373562085-29728-1-git-send-email-agraf@suse.de Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-11PPC: dbdma: Support more multi-issue DMA requestsAlexander Graf1-2/+2
A DMA request can happen for data that hasn't been completely been provided by the IDE core yet. For example - DBDMA request for 0x1000 bytes - IDE request for 1 sector - DBDMA wants to read 0x1000 bytes (8 sectors) from bdrv - breakage Instead, we should truncate our bdrv request to the maximum number of sectors we're allowed to read at that given time. Once that transfer is through, we will fall into our recently introduced waiting logic. - DBDMA requests for 0x1000 bytes - IDE request for 1 sector - DBDMA wants to read MIN(0x1000, 1 * 512) bytes - DBDMA finishes reading, indicates to IDE core that transfer is complete - IDE request for 7 sectors - DBDMA finishes the DMA Reported-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11PPC: Add timer handler for newworld mac-ioAlexander Graf1-0/+33
Mac OS X accesses fancy timer registers inside of the mac-io on bootup. These really should be ticking at the mac-io bus frequency, but I don't see anyone upset when we just make them as fast as we want to. With this patch on top of my previous patch queue and latest OpenBIOS I am able to boot Mac OS X 10.4 with -M mac99. Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11PPC: dbdma: Support unaligned DMA accessAlexander Graf2-7/+127
The DBDMA engine really just reads bytes from a producing device (IDE in our case) and shoves these bytes into memory. It doesn't care whether any alignment takes place or not. Our code today however assumes that block accesses always happen on sector (512 byte) boundaries. This is a fair assumption for most cases. However, Mac OS X really likes to do unaligned, incomplete accesses that it finishes with the next DMA request. So we need to read / write the unaligned bits independent of the actual asynchronous request, because that one can only handle 512-byte-aligned data. We also need to cache these unaligned sectors until the next DMA request, at which point the data might be successfully flushed from the pipe. Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11PPC: dbdma: Wait for DMA until we have dataAlexander Graf2-0/+20
We should only start processing DMA requests when we have data to process. Hold off working through the DMA shuffling until the IDE core told us that it's ready. This is required because the guest can program the DMA engine or the IDE transfer first. Both are legal. Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11PPC: dbdma: Move processing to ioAlexander Graf2-5/+8
Soon we will introduce intermediate processing pauses which will allow the bottom half to restart a DMA request that couldn't be fulfilled yet. For that to work, move the processing variable into the io struct which is what DMA providers work with. While touching it, also change it into a bool Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11PPC: dbdma: macio: Add DMA callbackAlexander Graf2-0/+42
We need to know when the IDE core starts a DMA transfer. Add a notifier function so we have the chance to start transmitting data. Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11PPC: dbdma: Move static bh variable to device structAlexander Graf2-9/+16
The DBDMA controller has a bottom half to asynchronously process DMA request queues. This bh was stored as a gross static variable. Move it into the device struct instead. While at it, move all users of it to the new generic kick function. Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11PPC: dbdma: Introduce kick functionAlexander Graf2-0/+6
The DBDMA engine really is running all the time, waiting for input. However we don't want to waste cycles constantly polling. So introduce a kick function that data providers can call to notify the DBDMA controller of new input. Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11PPC: dbdma: Move defines into header fileAlexander Graf2-117/+118
We usually keep struct and constant definitions in header files. Move them there to stay consistent and to make access to fields easier. Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11PPC: dbdma: Allow new commands in RUN stateAlexander Graf1-3/+3
The DBDMA controller can not change its command stream while it's actively streaming data, true. But the fact that it's in RUN state doesn't actually indicate anything. It could just as well be in WAIT while in RUN. And then it's legal to change commands. This fixes a real world issue I've encountered with Mac OS X. Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11PPC: dbdma: Fix debug printAlexander Graf1-1/+2
There was a debug print that didn't compile for me because the format and the arguments weren't in sync. Fix it up. Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11PPC: Mac: Add debug prints in macio and dbdma codeAlexander Graf2-6/+51
The macio code is basically undebuggable as it stands today, with no debug prints anywhere whatsoever. DBDMA was better, but I needed a few more to create reasonable logs that tell me where breakage is. Add a DPRINTF macro in the macio source file and add a bunch of debug prints that are all disabled by default of course. Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11PPC: dbdma: Replace tabs with spacesAlexander Graf1-51/+51
s/^I/ /g on the file with a few manual tweaks to align things. Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11PPC: Macio: Replace tabs with spacesAlexander Graf1-4/+4
s/^I/ /g on the file. Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11PPC: g3beige: Move secondary IDE bus to mac-ioAlexander Graf3-48/+64
On a real G3 Beige the secondary IDE bus lives on the mac-io chip, not on some random PCI device. Move it there to become more compatible. While at it, also clean up the IDE channel connection logic. Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11PPC: Mac: Fix guest exported tbfreq valuesAlexander Graf2-4/+6
We can tell the guest the frequency of its time base through fwcfg. However, we tell it a different value from the speed tb actually runs at. Let's fix it and make the tbfreq initialization and the fwcfg exposure use the same values. Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11target-ppc: Add POWER8 v1.0 CPU modelPrerna Saxena3-0/+38
This patch adds CPU PVR definition for POWER8, and enables QEMU to launch guests on POWER8 hardware. Signed-off-by: Prerna Saxena <prerna@linux.vnet.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: Paul Mackerras <paulus@samba.org> Reviewed-by: Andreas Farber <afaerber@suse.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11pseries: move interrupt controllers to hw/intc/Alexey Kardashevskiy4-1/+4
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11spapr: Respect -bios command line option for SLOFAndreas Färber1-1/+4
Allow the user to override the firmware file name rather than always using "slof.bin". Reported-by: Dinar Valeev <k0da@opensuse.org> Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11spapr: Use named enum for function remove_hpteStefan Weil1-4/+4
The function returned a target_ulong which was made from unnamed enum values. The target_ulong was then assigned to an int variable which was used in a switch statement. Using a named enum in both cases makes reviews easier. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11spapr: Fix compiler warnings for some versions of gccStefan Weil2-3/+3
i686-w64-mingw32-gcc (GCC) 4.6.3 from Debian wheezy reports these warnings: hw/ppc/spapr_hcall.c:188:1: warning: control reaches end of non-void function [-Wreturn-type] hw/ppc/spapr_pci.c:454:1: warning: control reaches end of non-void function [-Wreturn-type] Both warnings are fixed by using g_assert_not_reached instead of assert. A second line with assert(0) in spapr_pci.c which did not raise a compiler warning was modified, too, because g_assert_not_reached documents the purpose of that statement and is not removed in release builds. Signed-off-by: Stefan Weil <sw@weilnetz.de> Acked-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-11e600 core for MPC86xx processorsJulio Guerra3-9/+130
MPC86xx processors are based on the e600 core, which is not the case in qemu where it is based on the 7400 processor. This patch creates the e600 core and instantiates the MPC86xx processors based on it. Therefore, adding the high BATs, the SPRG 4..7 registers, which are e600-specific [1], and a HW MMU model (as 7400). This allows to define the MPC8610 processor too. Tested with a kernel using the HW TLB misses. [1] http://cache.freescale.com/files/32bit/doc/ref_manual/E600CORERM.pdf Signed-off-by: Julio Guerra <guerr@julio.in> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-10Merge remote-tracking branch 'luiz/queue/qmp' into stagingAnthony Liguori7-52/+82
# By Kevin Wolf (4) and others # Via Luiz Capitulino * luiz/queue/qmp: add timestamp to error_report() qapi-schema: Use existing type for drive-backup arguments qapi-schema: Use BlockdevSnapshot type for blockdev-snapshot-sync qapi.py: Allow top-level type reference for command definitions qapi.py: Avoid code duplication qemu-char: Fix ringbuf option size Message-id: 1373478767-20965-1-git-send-email-lcapitulino@redhat.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-10add timestamp to error_report()Seiji Aguchi4-0/+49
[Issue] When we offer a customer support service and a problem happens in a customer's system, we try to understand the problem by comparing what the customer reports with message logs of the customer's system. In this case, we often need to know when the problem happens. But, currently, there is no timestamp in qemu's error messages. Therefore, we may not be able to understand the problem based on error messages. [Solution] Add a timestamp to qemu's error message logged by error_report() with g_time_val_to_iso8601(). Signed-off-by: Seiji Aguchi <seiji.aguchi@hds.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2013-07-10qapi-schema: Use existing type for drive-backup argumentsKevin Wolf1-30/+2
This removes duplicated definitions and documentation by reusing the existing data type. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2013-07-10qapi-schema: Use BlockdevSnapshot type for blockdev-snapshot-syncKevin Wolf1-12/+2
We don't have to duplicate the definition any more now that we may refer to a type instead. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2013-07-10qapi.py: Allow top-level type reference for command definitionsKevin Wolf1-0/+19
If 'data' for a command definition isn't a dict, but a string, it is taken as a (struct) type name and the fields of this struct are directly used as parameters. This is useful for transactionable commands that can use the same type definition for both the transaction action and the arguments of the standalone command. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2013-07-10qapi.py: Avoid code duplicationKevin Wolf1-9/+9
The code that interprets the read JSON expression and appends types to the respective global variables was duplicated. We can avoid that by splitting off the part that reads from the file. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2013-07-10qemu-char: Fix ringbuf option sizeMarkus Armbruster1-1/+1
Any attempt to use it trips an "opt->desc->type == QEMU_OPT_NUMBER" assertion. Broken in commit 1da48c65. Cc: qemu-stable@nongnu.org Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>